Convenience-store donburi is semi-finished, and comes skewered and frozen. When you cook it, just wash it with water to remove the ice chips and floating oil on the outside. The main thing is the soup, to make a good, I used to do night work in the Japanese convenience store, that is, the soup is the company from the designated restaurant to bring, boil the water, the soup according to the ratio of 3 to 2 than then add, boil the semi-finished products after washing, into the, and then boiled on it, it's good, can be sold. Nothing special, the main thing is the soup.